SU647738A1

SU647738A1 - Device for guiding magnatic tape in the magnetic head section

Info

Publication number: SU647738A1
Application number: SU772505103A
Authority: SU
Inventors: Ауксутис Аницетович Якштас; Римвидас Пятро Ясинавичюс; Юрий Сергеевич Епишкин; Владимир Ильич Труфанов; Владимир Викторович Раков; Евгений Антонович Наумович
Original assignee: Предприятие П/Я А-3593
Priority date: 1977-07-05
Filing date: 1977-07-05
Publication date: 1979-02-15

Description

Дл этого рабоча поверхность головки выполнена с пазом, расположенным между ее нижним основанием и слецукь шчм за ним сердечником, а пластина концентратора, плоскость которой аимодействует с нижней кромкой ленты, помещена в этом пазу одним из своих краев под углом 9О к рабочей поверхности магнитной головки. На чертеже показана конструкци опи сываемого устройства. Магнитна nerfra 1 своей плоскостью соприкасаетс с рабочей поверхностью 2 магнитной головки 3, а нижней кромкой 4 - с плоскостью пластины 5, один край которой расположен в. пазу 6, выполненном на рабочей поверхносй-и 2. Пластина жестко сопр жена с малым основанием 7 концентратора, в который В;ХОдит также к большое осно вание 8. Таким образом, концентратор состоит из двух оснований 7 и S возбуждение же его осуществл етс отпьез преобразователей 9, зафиксированных пр помощи гайки Ю. При подаче на пьезопреобразователи напр жени ультразвуковой частоты в концентраторе воз1Шкает сто ча полувол на продольных колебаний. Так: как сечение оснований концентратора разное, то малое основание 7 колеблетс в про дольном направлении с большей амплитудой по сравненик с основа:нием 8. Тог да через пластину 5 на ленту 1 начинают передаватьс колебани этой же частоты и амплитуды. Дл движущейс ленч ты эти колебани с точки зрени линейности канала записи и воспр оизведени не , но они создают микроподушку из воздуха между лентой и рабо чей поверхностью головки. , В результате отсутстви непосредственного контакта между лентой и головкой исчезает эффект сползани (дрейфа) ленты по рабочей поверхности головки, что всегдаFor this, the working surface of the head is made with a groove located between its lower base and a slit ball behind it, with the core, and the concentrator plate, whose plane interacts with the lower edge of the tape, is placed in this groove with one of its edges at an angle of 9О to the working surface of the magnetic head. The drawing shows the design of the described device. The magnetic nerfra 1 with its plane is in contact with the working surface 2 of the magnetic head 3, and the lower edge 4 with the plane of the plate 5, one edge of which is located at. a groove 6 made on the working surface 2. The plate is rigidly joined to the small base 7 of the concentrator, into which B; it also goes to the large base 8. Thus, the concentrator consists of two bases 7 and S excites it. transducers 9, fixed with the help of a nut Y. When applying ultrasonic frequency voltage to the piezoelectric transducers in the hub, a hundred-half-wave pivots on longitudinal vibrations. Thus, since the section of the bases of the concentrator is different, the small base 7 oscillates in the longitudinal direction with a larger amplitude compared to the base: 8. 8. Then, through the plate 5, the vibrations of the same frequency and amplitude begin to be transmitted to the tape 1. For moving lunch, these fluctuations are not from the point of view of linearity of the recording channel and playback, but they create a micro-pillow from the air between the tape and the working surface of the head. As a result of the absence of direct contact between the tape and the head, the effect of slipping (drift) of the tape along the working surface of the head disappears, which is always

Claims

647738 To some extent it takes place at the direct contact of these elements, at the same time the gap between the deft and tape is so small that it affects the quality of the recorded and reproducible information. In this case, the accuracy of exposing the tape relative to the working gap 11 of the head 3 is significantly increased. The described design allows or completely excludes the use of guide elements manufactured with high accuracy, or significantly reduces their number, and consequently, the metal consumption and labor costs are reduced . Apparatus of the Invention A device for guiding a magnetic tape in a section of a working gap of a magnetic head, comprising a concentrator of longitudinal ultrasonic vibrations with large and small bases, as well as a plate rigidly conjugated with its small base, in order to improve the accuracy exposing and reducing parasitic disturbances of the moving magnetic tape relative to the working gap of the head, the working surface of the latter is made with a groove located between its base and following core and said plate, the plane of which cooperates with the lower edge of the tape, is placed in the groove with one of its edges 90 to the working surface of the magnetic head. Sources of information taken into account in the examination 1. US Patent No. 3526726, -. cl. 179-100.2, 197О. 2 "USSR Author's Certificate No. 539317, kp; From 11 to 5/11, 1975.,